Bleeding under vitamin K antagonists are a major iatrogenic causes of hospitalization, subject to a fatal outcome in more than one third of cases, mortality is particularly high in cases of serious bleeding, including intracerebral hemorrhage. If the INR measured in these patients are often away from the higher value of the target range, a significant proportion of bleeding were observed for INR between 2 and 3. The study captures the components of the nutritional status of patients on oral anticoagulants, including any micronutrient deficiencies, to determine whether nutritional status is an independent risk factor for bleeding